selective – designed to grow only specific bacteria but not others. eg. GN broth promotes the growth of Gram negatives but not Gram positive organisms

differential – designed to show the difference between different organisms grown on it. eg. some organisms look pink while others can look colourless on MacConkey agar.

enriched – designed to promote the growth of particular organisms. different to selective in that it doesn’t usually specifically inhibit other growth.
Selective Vs Differential Media
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RE:

What is the difference between selective, differential and enriched media for growing bacterial cultures?
Enriched Media
Selective – a medium that ‘selects’ the growth of a particular microorganism.

Differential – allows a more specific identification of certain bacteria.
Sorry I don’t know about this
Good discussion, just what I was looking for.